Program at 1:0
+-- sourceType: script
+-- body:
|   +-- 0: VariableDeclaration at 1:0
|   |   +-- kind: let
|   |   +-- declarations:
|   |   |   +-- 0: VariableDeclarator at 1:4
|   |   |   |   +-- id: ArrayPattern at 1:4
|   |   |   |   |   +-- elements:
|   |   |   |   |   |   +-- 0: Identifier at 1:5
|   |   |   |   |   |   |   +-- name: a
|   |   |   |   |   |   +-- 1: Identifier at 1:8
|   |   |   |   |   |   |   +-- name: b
|   |   |   |   +-- init: ArrayExpression at 1:13
|   |   |   |   |   +-- elements:
|   |   |   |   |   |   +-- 0: Literal at 1:14
|   |   |   |   |   |   |   +-- value: 4.0
|   |   |   |   |   |   +-- 1: Literal at 1:17
|   |   |   |   |   |   |   +-- value: 4.0